JP3825828B2

JP3825828B2 - Seedling transplanter

Info

Publication number: JP3825828B2
Application number: JP05513996A
Authority: JP
Inventors: 正文佐伯; 秀夫井関; 哲加藤; 寿美福島; 龍之鳥津
Original assignee: Iseki and Co Ltd
Current assignee: Iseki and Co Ltd
Priority date: 1996-03-12
Filing date: 1996-03-12
Publication date: 2006-09-27
Anticipated expiration: 2016-03-12
Also published as: JPH09238522A

Description

【発明の属する技術分野】
【０００１】
この発明は、多条植えの苗移植機の構成に関する。
【従来の技術及びこの発明が解決しようとする課題】
従来、例えば、特開平６−２９６４０７号公報に示されるように、載置した苗を苗植付装置に供給する苗供給装置が操縦席の後方に位置しているので、苗供給装置がオペレ−タの後方の視界を遮り、苗の植付状態を見ながら植付作業をすることが困難であった。
【課題を解決するための手段】
【０００２】
この発明は、上記課題を解決すべく次の技術的手段を講じた。
【０００３】
すなわち、操縦席（７）を備えた走行車体（２）の後側に苗植付部（３）が装着された苗移植機において、苗植付部（３）の苗移植ユニット（３ａ）として、苗箱搬送装置（２１）と第一苗取出装置（２２）と苗下降送り装置（２３）と第二苗取出装置（２４）と横送装置（２５）とからなる苗供給装置（２０）を設けるとともに、植付伝動部（４２）から後方に延びる左右２つの植付伝動フレーム（５８）の後側対向面に苗植付装置（２６）を設け、苗箱搬送装置（２１）で搬送される苗箱の横一列のポットから第一苗取出装置（２２）により苗を一斉に押し出し、押し出された苗を苗下降送り装置（２３）の苗ホルダー（２３ａ）により下降搬送し、前記苗ホルダー（２３ａ）の苗ホールド部（２３ｉ）内に保持される苗を受け止めて苗ホルダー（２３ａ）のみを通過させる第二苗取出装置（２４）の苗抜取り具（２４ａ）により横送装置（２５）の苗送りベルト（２５ａ）上に苗を強制的に抜き落とし、抜き落とされた苗を前記苗送りベルト（２５ａ）により左右両側に搬送して左右の苗植付装置（２６，２６）へ搬送し、搬送された苗を前記苗植付装置（２６）の苗植付杆（２６ａ）により上方から受け取って植付ガイド（２６ｃ）内を直立した状態となるまで移送させて圃場に植え付ける２条植えの苗移植ユニット（３ａ）を構成し、該苗移植ユニット（３ａ）を左右方向に間隔を空けて４つ設けて８条植えの苗植付部（３）を構成し、４つの苗移植ユニット（３ａ）間の空間部を中央の空間部（Ａ）と左右の空間部（Ｂ（Ｌ），Ｂ（Ｒ））とで３か所設け、中央の空間部（Ａ）の前方に操縦席（７）を配置することにより、オペレータの後方の視界を広くしたことを特徴とする苗移植機とした。
【作用】
【０００４】
本発明の苗移植機は、苗移植ユニット３ａにより、苗箱搬送装置２１で苗箱を苗取出位置へ搬送し、第一苗取出装置２２で苗取出位置において苗箱の横一列のポットから苗を一斉に押し出し、その押し出された苗を苗下降送り装置２３の苗ホルダー２３ａにより下降搬送し、第二苗取出装置２４の苗抜取り具２４ａにより前記苗ホルダー２３ａの苗ホールド部２３ｉ内に保持される苗を受け止めて苗ホルダー２３ａのみを通過させて苗を抜き出して横送装置２５の苗送りベルト２５ａ上に強制的に抜き落とし、抜き落とされた苗を前記苗送りベルト２５ａにより左右両側に搬送して左右の苗植付装置２６，２６へ搬送し、搬送された苗を前記苗植付装置２６の苗植付杆２６ａにより上方から受け取って植付ガイド２６ｃ内を直立した状態となるまで移送させて圃場へ植え付ける。そして、４つの苗移植ユニット３ａ間の中央の空間部Ａの前方に操縦席７を配置することにより、オペレ−タの後方の視界が広くなる。
【発明の効果】
【０００５】
よって、植付伝動部４２から後方に延びる左右２つの植付伝動フレーム５８の後側対向面に苗植付装置２６を設け、苗箱搬送装置２１で搬送される苗箱の横一列のポットから第一苗取出装置２２により苗を一斉に押し出し、押し出された苗を苗下降送り装置２３の苗ホルダー２３ａにより下降搬送し、前記苗ホルダー２３ａの苗ホールド部２３ｉ内に保持される苗を受け止めて苗ホルダー２３ａのみを通過させる第二苗取出装置２４の苗抜取り具２４ａにより横送装置２５の苗送りベルト２５ａ上に苗を強制的に抜き落とし、抜き落とされた苗を前記苗送りベルト２５ａにより左右両側に搬送して左右の苗植付装置２６，２６へ搬送し、搬送された苗を前記苗植付装置２６の苗植付杆２６ａにより上方から受け取って植付ガイド２６ｃ内を直立した状態となるまで移送させて圃場に植え付ける２条植えの苗移植ユニット３ａを構成し、該苗移植ユニット３ａを左右方向に間隔を空けて４つ設けて８条植えの苗植付部３を構成し、中央の空間部Ａの前方に操縦席７を配置することにより、オペレ−タの後方の視界が広くなり、苗の植付状態を見ながら植付作業をすることができる。
【実施例】
【０００６】
この発明の一実施例を図面に基づき説明する。
【０００７】
図１は、乗用型の田植機１であり、走行車体２の後側に８条植えの苗植付部３が装着されている。また、走行車体２の後部には、粒状の肥料を散布する施肥装置４を配設している。
【０００８】
走行車体２は、左右一対の前輪５，５及び後輪６，６を装着し、これらの前後輪５，６を駆動して走行する。略中央に操縦席７を備え、該操縦席７の前側にステアリングハンドル８を設けている。この走行車体２の後部に、リンク機構９を介して着脱ヒッチ１０により前記苗植付部３を装着し、苗植付部３に設けられた油圧バルブ１１を介して作動する油圧昇降シリンダ１２の伸縮により上下に昇降可能に設けている。また、該苗植付部３は、走行車体側から動力が伝達される植付入力軸１３の駆動により作動する構成である。
【０００９】
８条植えの苗植付部３は、苗箱搬送装置２１，…、第一苗取出装置２２，…、苗下降送り装置２３，…、第二苗取出装置２４，…、横送装置２５，…により構成される苗供給装置２０，…と苗植付装置２６，…を備えている。図５〜図１２に示すように、各２条毎の苗移植ユニット３ａは、苗箱搬送装置２１に複数枚の苗箱が充填されると、該苗箱搬送装置２１により第一苗取出位置に搬送された苗箱の横一列のポットから、第一苗取出装置２２により苗を一斉に押し出し、押し出した苗を苗下降送り装置２３の苗ホルダ−２３ａに保持されて弧を画くような軌跡で下降搬送し、第二苗取出装置２４で横送装置上に抜き落し、抜き落した苗を横送装置２５によりその左右両端の苗植付装置２６，２６に左右半分ずつに分かれて横送りし、一株づつ苗植付装置２６，２６により苗を圃場に植え付けていくようになっている。また、苗植付部３の下部にはフロ−ト３１ａ，３１ａ，３１ｂ，３１ｂを設けており、圃場面を整地しながら滑走する構成である。前記各フロ−ト３１ａ，３１ａ，３１ｂ，３１ｂは、左右方向の枢支軸３２回りに回動するように設けられている。この左右方向の枢支軸３２の苗植付装置２６に対する高さは、植付深さ調節パイプ３３の回動により調節可能となっており、この植付深さ調節パイプ３３の回動角を植付深さレバ−３４により調節する構成となっている。
【００１０】
また、前記４つのフロ−ト３１ａ，３１ａ，３１ｂ，３１ｂの内中央寄りの２つのフロ−ト３１ａ，３１ａは、該フロ−ト前端部を接続部材３５により接続されており、この２つのフロ−ト３１ａ，３１ａの前後方向の回動角が同一となるような構成となっている。前記接続部材３５の両フロ−ト間の中途部に図１３に示すような圃場面感知機構３６が構成され、この圃場面感知機構３６に苗植付部３の昇降用の前記油圧バルブ１１が取り付けられ、該圃場面感知機構３６の作動に伴って前記油圧バルブ１１のスプ−ル１１ａの切替を行う構成となっている。この圃場面感知機構３６は、前記接続部材３５に固着された上方が開放されたコの字形プレ−ト３６ａ、リンク３６ｂ，３６ｃ、これらのリンク３６ｂ，３６ｃを枢支する枢支軸３６ｄ，３６ｅ，３６ｆとから構成される。また、油圧バルブ１１は、本体を前記枢支軸３６ｄに枢支し、スプ−ル端を前記コの字形プレ−ト３６ａと枢着するプレ−ト３６ｇに設けた別の枢支軸３６ｈに枢支して、これらのリンク機構の左側方に取り付けられている。尚、前記コの字型プレ−ト３６ａと前記枢支軸３６ｈとの間には、トルクスプリング３６ｉが設けられている。従って、フロ−ト前部が上動すると、トルクスプリング３６ｉに付勢されながら前記プレ−ト３６ｇが上動して油圧バルブ１１のスプ−ル１１ａを押し上げ、該油圧バルブ１１により油圧昇降シリンダ内へ油圧が供給され、苗植付部３が上昇する。逆に、フロ−ト前部が下動すると、前記プレ−ト３６ｇが下動して油圧バルブ１１のスプ−ル１１ａを押し下げ、該油圧バルブ１１により油圧昇降シリンダ１２の油圧が油圧タンク３７（ミッションケ−ス内の潤滑油を油圧用と兼用している）に戻され、苗植付部３が下降する。すなわち、フロ−ト前部の上下動に伴って油圧昇降シリンダ１２を作動させ、圃場面に対して苗植付部３を所定の高さに維持できるようになっている。
【００１１】
また、前記植付深さ調節パイプ３３の回動に伴ってロッド３８を介して副植付伝動ケ−ス３９に設けた回動支点４０ａ回りに回動する油圧バルブ調節リンク４０により、植付伝動部に対する油圧バルブ１１の高さが調節される。すなわち、植付深さに対応して植付伝動部に対する油圧バルブ１１の高さが設定された構成となっている。尚、前記ロッド３８はナット４１，４１等により長さを調整可能な構成であり、機体平面視又は背面視で苗供給装置２０，…と重複しないので、機体後方から苗供給装置２０，…の間の空間部Ａへ作業者が身をのり入れてこのロッド３８の長さ調整等が行え、メンテナンスが容易である。
【００１２】
前記着脱ヒッチ１０は、前記リンク機構９を構成する前側ヒッチ１０ａと前側ヒッチ１０ａに着脱することが可能な後側ヒッチ１０ｂとで構成される。図１４、図１５に示すように、この後側ヒッチ１０ｂの下部に苗植付部３を支持するロ−リング軸受部４１を備えている。この軸受部４１に苗植付部３の植付伝動部４２に固着されているロ−リング軸４３が嵌合し、苗植付部３を支持する構成となっている。また、前記着脱ヒッチ１０に対して苗植付部３が前記ロ−リング軸４３回りに回動可能な構成となっている。また、後側ヒッチ１０ｂの後方には該ヒッチ１０ｂに枢支されるロ−リングア−ム４４が設けられている。すなわち、ヒッチ１０ｂの後側にロ−リングア−ム４４の回動軸４５ａが固着されたプレ−ト４５をボルト４５ｂ，４５ｃ、ナット４５ｄ，４５ｅ，４５ｆ等により取り付け、前記回動軸４５ａによりロ−リングア−ム４４を枢支している。また、前記回動軸４５ａにはピン孔４５ｇが設けられ、このピン孔４５ｇにピン４６を挿入し固定してロ−リングア−ム４４が回動軸４５ａに沿って前方に移動するのを規制している。このロ−リングア−ム４４の上部には苗植付部３の植付伝動部４２の左右に固着したフレ−ム部４７，４７からロ−リングスプリング４８，４８が掛けられている。また、ロ−リングア−ム４４の下部は扇型のギア４４ａになっており、この扇型のギア４４ａにロ−リングモ−タ４９の出力ギア４９ａの出力がカウンタギア５０，５１により減速され伝動されるようになっている。従って、ロ−リングモ−タ４９の出力ギア４９ａの駆動によりロ−リングア−ム４４が回動軸４５ａ回りに回動し前記着脱ヒッチ１０に対して左右方向に傾くと該ア−ム上部に掛けられた左右のロ−リングスプリング４８，４８の一方が引かれて（他方はスプリング方向に戻されて）苗植付部３が走行車体２に対して左右に傾くようになっている。ロ−リングモ−タ４９は、左右最外側のフロ−ト３１ｂ，３１ｂの前部の上動を検出する左右のフロ−ト上動検出センサ５２Ｌ，５２Ｒの検出値に差異が生じると、前記左右のセンサ５２Ｌ，５２Ｒの検出値が同一となるようにすなわち苗植付部３を圃場面と水平にすべく作動する。また、前記ロ−リングア−ム４４を前記回動軸４５ａ方向に摺動させ、前記カウンタギア５１と該ア−ム下部の扇型のギア４４ａの噛み合いを解除することで、走行車体２に対して苗植付部３を平行に固定することができる。すなわち、前記ア−ム４４の回動軸４５ａのピン孔４５ｇに挿入されているピン４６を抜き該ア−ム４４を回動軸４５ａに沿って前方へ移動し再度ピン４６をピン孔４５ｇに挿入し固定して該ア−ム位置を切り替えることによって、該ア−ム４４へのロ−リングモ−タ４９からの伝動を断つと共に該ア−ム下部に該ア−ム４４に固着された回動規制ピン４４ｂが前記プレ−ト４５に備えるピン嵌合孔４５ｈに嵌合してロ−リングア−ム４４の回動が固定されるようになっている。このロ−リング切替操作は、前記ア−ム部が機体平面視又は背面視で苗供給装置２０，…と重複しないので、機体後方から苗供給装置２０，…の間の空間部Ａへ作業者が身をのり入れて切替操作が行える。
【００１３】
ところで、この乗用型の田植機１で使用される苗箱Ｎは、プラスチック製の可撓性の苗箱であり、図３，４に示されるような形状になっている。即ち、小さいポットＰ，…が左右前後に所定の間隔で並び、開口部Ｐａ，…が互いに連結し底部Ｐｂ，…側が独立した形状に成形されている。また、苗箱Ｎの長手方向に沿う左右の端縁部Ｎａ・Ｎａには、ポットＰ，…の長手方向の間隔に合わせて苗箱送り用の角孔Ｎｂ，…が設けられている。各ポットＰ，…の底部Ｐｂ，…には、苗押出しピン２２ａが底部側から侵入できる切れ目Ｐｃが設けられている。Ｎｃは左右（短手方向）中央で長手方向に向けて設けられた広間隔部である。育苗は、各ポットＰ，…内に床土を詰めて播種、覆土し、育苗される。こうして各ポットＰ，…毎に一株づつ育苗された苗箱Ｎは、苗植付部３の苗箱供給部２１ａ，２１ａに苗箱ごと装填され、底部側から第一苗取出装置２２の苗押出しピン２２ａで押し出されて苗が取り出される。
【００１４】
苗箱搬送装置２１は、各２条毎に設けられ、図５に示すように、後下がりに傾斜した上下２段の苗箱供給部２１ａ，２１ａ（苗供給部）と、その２段の苗箱供給部２１ａ，２１ａから苗箱搬送路を合流して搬送し、更に前側上方へ苗箱を搬送する苗箱搬送部２１ｂ（主供給部）と、それに続いて前記苗箱供給部２１ａ（苗供給部）の下方へ空箱を搬送する空箱搬送部２１ｃとからなる構成である。また、前記空箱搬送部２１ｃの出口には、そこから排出される空箱を複数枚重ねた状態で収容できる空箱収容枠２１ｄを設けている。尚、上下２段の苗箱供給部２１ａ，２１ａは、苗箱供給部支持フレ−ム５４に固着したル−プ状のパイプ６０，６０により固定されている。前記上下２段の苗箱供給部２１ａ，２１ａにはそれぞれ苗箱供給作動モ−タ５３，５３を設けており、該モ−タ５３は駆動軸に搬送ロ−ラ５３ａ、５３ａを備えている。また、該搬送ロ−ラ５３ａの上方にスプリング力により該搬送ロ−ラ５３ａ方向へ付勢されている押さえロ−ラ５３ｂを設けており、搬送ロ−ラ５３ａ，５３ａと押さえロ−ラ５３ｂ，５３ｂとにより苗箱端縁部Ｎａ・Ｎａを挟んで苗箱を搬送する構成となっている。尚、苗箱供給部支持フレ−ム５４に取り付けたコントロ−ラ５５により、苗箱搬送部２１ｂ（主供給部）の苗箱の減少に伴って該搬送ロ−ラ５３ａを駆動し、苗箱供給部２１ａ，２１ａの苗箱を供給制御する構成である。
【００１５】
また、図６に示すように、前記上下２段の苗箱供給部２１ａ，２１ａから苗箱搬送部（主供給部）２１ｂへの苗箱搬送路の合流部は、苗箱搬送路が側面視で大きく曲がっており苗箱搬送抵抗が大きくなるため、この搬送抵抗を低減するために苗箱搬送路の搬送方向と交差する方向の幅Ｗが広幅となっている。ところが、前記幅Ｗが広幅になると、搬送方向と交差する方向への苗箱のばたつきが発生し、苗箱からポット苗が脱落しやすくなる。そこで、左右方向の回動軸５６ａ回りに回動自在の苗押さえプレ−ト５６が設けられ、該プレ−ト５６は、前記合流部を通過する苗箱Ｎの苗を該苗箱ＮのポットＰの開口部Ｐａ側から該プレ−ト５６の自重により押さえるように構成されている。この苗押さえプレ−ト５６により、前記合流部における搬送方向と交差する方向への苗箱のばたつきを抑制し、苗箱からポット苗が脱落するのを防止している。
【００１６】
苗植付部３の伝動構成は、図２に示すように、前記植付入力軸１３からベベルギア等を介して植付伝動軸５７を駆動し、該伝動軸５７から各条の副植付伝動ケ−ス３９，…、植付伝動フレ−ム５８，…等へ動力を伝達する構成となっている。また、図７に示すように、前記苗箱搬送部（主供給部）２１ｂ，…は前記伝動軸５７を内蔵する植付伝動部４２によりその上側に支持された左右の伝動ケ−ス５９ａ・５９ｂ，…及びその両伝動ケ−ス５９ａ，５９ｂを接続するフレ−ム５９ｃ，…で構成する門型のフレ−ム５９，…により支持固定され、前記フレ−ム５９ｃの上側に固定された前記苗箱供給部支持フレ−ム５４で苗箱供給部２１ａ，２１ａ、空箱搬送部２１ｃ及び空箱収容枠２１ｄを支持している。苗箱は、植付伝動部４２と門型のフレ−ム５９とで囲まれた部分を通過するようになっている。各２条毎の苗搬送装置２１，…は、それぞれの間に空間部Ａ，Ｂ（Ｌ），Ｂ（Ｒ）が設けられ構成されている。尚、この田植機は、操縦席７の後方に苗供給装置２０，…の間の空間部Ａが位置するため、オペレ−タの後方の視界が広くなり、苗の植付状態を見ながら植付作業をすることができる。
【００１７】
苗箱搬送装置２１の苗箱搬送部２１ｂには、図８〜図１０に示すように、第一苗取出位置で苗箱を係止しながら間歇的に苗箱をポット横一列分ずつ搬送する苗箱縦送り装置６１を設けている。該苗箱縦送り装置６１は、苗箱端縁の前記苗箱送り用の角孔Ｎｂに作用すべく、苗箱搬送路に沿って往復作動する送り爪６１ａ，６１ａと、それに連動して係脱する係止爪６１ｂ，６１ｂを備えている。この苗箱縦送り装置６１の作動は、各２条毎の副植付伝動ケ−ス３９の各左側部に突出する苗箱縦送り駆動軸６１ｃと連動連結して作動する構成である。
【００１８】
次に、苗箱から苗を取り出してからその苗を圃場に植え付けるまでに関する各２条毎の機構について図８〜図１２に基づいて説明する。
【００１９】
前記第一苗取出装置２２は、前記苗箱搬送装置２１により搬送されてくる苗箱から、その第一苗取出位置のポット内の苗をスライド作動する苗押出しピン２２ａ，…で苗箱の横一列分ずつ押し出す構成である。該第一苗取出装置２２は、副植付伝動ケ−ス３９の各左側部に突出する苗取出及び搬送の駆動軸２２ｂに連動連結している。すなわち、該駆動軸２２ｂに一体回転する駆動ア−ム２２ｃが、伸縮ロッド２２ｄを介して左伝動ケ−ス５９ａの押出し作動軸２２ｆに一体回転するよう取り付けられている作動ア−ム２２ｇと連結し、押出し作動軸２２ｆの揺動により左伝動ケ−ス内の押出し作動部が作動し苗押出し軸２２ｉが作動する構成である。尚、押出し作動軸２２ｆはフレ−ム５９ｃ内を通り右伝動ケ−ス５９ｂに動力を伝達し、同様に右伝動ケ−ス内の押出し作動部が作動し左苗押出し軸２２ｉが作動する構成である。よって、駆動軸２２ｂの回転駆動により、左右の苗押出し軸２２ｉ，２２ｉに取り付けられた苗押出しピン２２ａ，…がスライド作動する構成である。また、苗押出しピン２２ａ，…は、苗箱の横方向のポットに対して同数同ピッチで設けられていて、押出しピンガイド２２ｊの押出し孔２２ｋ，…及び苗箱の横一列分のポットの底部の切れ目Ｐｃを突き抜けて作動し、横一列分の苗を押し出す。尚、苗を押し出した後、苗箱縦送り装置６１が作動する前に該押出しピン２２ａ，…を引き戻す構成である。
【００２０】
苗下降送り装置２３は、図１２に示すように、前記第一苗取出装置２２により押し出された横一列分の苗を苗ホルダ−２３ａが苗受取り位置Ｐ３で受け取って、第二苗取出装置２４の苗取出位置Ｐ１〜Ｐ２に搬送する装置である。この苗下降送り装置２３は、副植付伝動ケ−ス３９の各右側部に突出する前記苗取出及び搬送の駆動軸２２ｂに一体回転する駆動ア−ム２３ｃが伸縮ロッド２３ｅを介して右伝動ケ−ス５９ｂに内蔵する苗ホルダ−作動部へ動力を伝達し、該苗ホルダ−作動部から伝動ケ−ス５９ａ，５９ｂの各左右両外側部に設けられるスイングア−ム２３ｄ，２３ｄ，２３ｄ，２３ｄに一体回転するスイング軸２３ｈ，２３ｈに連動連結する。このスイングア−ム２３ｄ，…の先端は苗ホルダ−２３ａの左右側端に固着する支持プレ−ト２３ｆ・２３ｆに枢着し、スイング軸２３ｈ・２３ｈを回動軸としてスイング作動するスイングア−ム２３ｄ，２３ｄと支持プレ−ト２３ｆとにより平行リンクを構成する。尚、駆動ア−ム２３ｃの駆動回転によりスイングア−ム２３ｄ，…が上動し、苗ホルダ−２３ａが苗押出し位置Ｐ３に至ると上側のスイングア−ム２３ｄがストッパ−体２３ｇに当たって止まる。駆動ア−ム２３ｃは尚も回転してスイングア−ム２３ｄを上動させようとするが、伸縮ロッド２３ｅが伸長して（伸縮ロッド２３ｅのスプリングケ−ス内のスプリングが縮んで）スイングア−ム２３ｄがストッパ−体２３ｇによって停止されたままとなる。よって、スイングア−ム２３ｄがストッパ−体２３ｇに当たって停止された状態にある間は、苗ホルダ−２３ａは苗受取り位置Ｐ３に位置し、第一苗取出装置２２により押し出された苗を受け取る。
【００２１】
この苗下降送り装置２３は、第一苗取出装置２２の苗押出しピン２２ａ，…の突出作動（苗押出し作動）が開始する前に苗ホルダ−２３ａが苗受取り位置Ｐ３に位置して停止し、苗押出しピン２２ａ，…の引っ込み作動が完了すると下動し始める。そして、横送装置２５が前回受けた苗を左右の苗取り位置にちょうど搬送し終えたときに苗下降送り装置２３が搬送する苗が第二苗取出装置２４により横送装置上に受け渡されるように作動する。その後、再び苗ホルダ−２３ａが上動して苗受取り位置Ｐ３に戻る。尚、この苗下降送り装置２３は、第一苗取出装置２２により押し出された苗をそれぞれ受け取る苗ホルダ−２３ａの凹状の苗ホ−ルド部２３ｉ，…を、苗搬送装置２１により搬送される苗箱ＮのポットＰ，…の左右方向の位置に合わせて形成している。
【００２２】
第二苗取出装置２４は、図１２に示すように、苗下降送り装置２３が苗抜取り位置Ｐ１〜Ｐ２に移動してきたとき、苗ホルダ−２３ａの各苗ホ−ルド部２３ｉ，…に保持される苗を苗抜取り具２４ａで抜き出して、横送装置２５の苗送りベルト２５ａ・２５ａ上に落とす装置である。苗抜取り具２４ａは櫛状に形成されていて、苗抜取り位置Ｐ１〜Ｐ２に移動してきた苗ホルダ−２３ａの各苗ホ−ルド部２３ｉ，…内に保持される苗を受け止め苗ホルダ−２３ａのみを通過させて苗を抜き出すように設けられている。また、苗抜取り具２４ａは、植付伝動部４２の左側部に突出する第一苗取出装置２２の駆動軸２２ｂに一体回転するように取り付けたカムディスク２４ｂにより上下動するように設けられている。すなわち、回動軸２４ｃ回りに回動する回動ア−ム２４ｄにピン２４ｅを固着し、該ピン２４ｅが前記カムディスク２４ｂのカム面に接当するよう付勢するスプリング２４ｆを前記回動ア−ム２４ｄに取り付ける。苗抜取り具２４ａの基部は前記回動ア−ム２４ｄにボルト２４ｇ，２４ｇにより一体的に取付けられている構成である。これにより、苗抜取り具２４ａは苗ホルダ−２３ａから苗を抜き出すと直ちに、上記カム機構により下動して横送装置２５の苗送りベルト２５ａ・２５ａ上に強制的に落とすよう作動する。また、この苗抜取り具２４ａの回動アーム２４ｄへの取付穴２４ｈ，２４ｈは上下方向に長穴に形成されており、苗抜取り具２４ａは取付位置を上下方向に調整可能に設けられている。これにより、図１２に示すように、ポット苗の根鉢ｒの硬さに応じて、根鉢ｒが硬いときは葉を後方へ向けた苗の根鉢底面の中心より上方部分を前記苗抜取り具２４ａが当接し作用するようにして、前記苗ホルダ−２３ａからの苗の抜取り抵抗を大きくし苗抜き出しによる苗の飛び出しを防止し、横送装置２５の苗送りベルト２５ａ・２５ａの適切な位置に苗を落とすことができる。
【００２３】
横送装置２５は、第二苗取出装置２４により抜き落とされた横一列分の苗を苗送りベルト２５ａ・２５ａ上に受けて左右半分づつ左右の苗植付装置２６・２６の苗取り位置Ｓ・Ｓに搬送する装置である。この横送装置２５は、植付伝動部４２の後側に突出し互いに逆方向に回転する駆動軸２５ｂ・２５ｂに駆動ロ−ラ−２５ｃ・２５ｃを一体回転するよう連結し、該駆動ロ−ラ−２５ｃ・２５ｃとその左右内側に回転自在に支持された従動ロ−ラ−２５ｄ・２５ｄとに苗送りベルト２５ａ・２５ａを巻き掛けて、該苗送りベルト２５ａ・２５ａの上面がそれぞれ左右両外側に移動するように作動するようになっている。また、苗送りベルト２５ａの外周面には複数の突起２５ｅ，…が設けられ、苗がこの突起２５ｅ，…の左右間に挟まれる位置に第二苗取出装置２４により抜き落とされ搬送される。苗送りベルト２５ａ・２５ａの回転作動は、苗植付装置２６・２６が苗取り位置Ｓ・Ｓから苗を一株づつ取っていくタイミングに合わせて苗を苗取り位置Ｓ・Ｓに搬送する。尚、左右の苗送りベルト間には、断面山形状の部材２５ｆが設けられて隙間を覆っている。
【００２４】
苗植付装置２６は、横送装置２５により苗取り位置Ｓに搬送された苗を一株づつ取って圃場に植え付けていく装置である。この苗植付装置２６は、植付伝動部４２から後方に延びる植付伝動フレ−ム５８の後側側部に取り付けられ、該植付伝動フレーム５８からの伝動により駆動する２体の苗植込杆２６ａ・２６ａを備えた構成となっている。２体の苗植付杆２６ａ・２６ａの先端は閉ル−プ軌跡Ｔを描いて移動し交互に苗を圃場へ植込んでいく。尚、横送装置２５の苗送りベルト上の苗はベルト終端で苗取り位置Ｓに設けた苗受け部２６ｂに落とし込まれる。苗受け部２６ｂは、左右に配した板状の植付ガイド２６ｃの上部に形成されている。苗受け部２６ｂに受けられた苗は、上方から苗植付杆２６ａの先端部に受け取られて該苗植付杆２６ａにより強制的に植付ガイド２６ｃを移動する。そして、苗植付杆２６ａにより苗が圃場面に直立した状態となるまで移送され、苗を圃場に植え付けられる構成となっている。
【００２５】
次に、植付伝動部４２の左右方向への伸縮構成について説明する。
【００２６】
前記植付伝動部４２は、副植付伝動ケ−ス３９、…が存在しない植付伝動フレ−ム間の左右中央部を除く部分Ｂ（Ｌ），Ｂ（Ｒ）が伸縮自在に構成されている。図１６、図１７に基づいて、その具体構成を右側の副植付伝動ケ−ス間Ｂ（Ｒ）の伸縮について説明する。
【００２７】
副植付伝動ケ−ス間の伸縮部は、中央寄りの植付伝動フレ−ム側に該フレ−ム５８に固着された外側ケ−ス６２と外寄りの植付伝動フレ−ム側に該フレ−ム５８に固着された内側ケ−ス６３とを備えて構成される。この外側ケ−ス６２と内側ケ−ス６３とが摺接することにより植付伝動フレ−ム間が伸縮する構成である。同様に伸縮部において、植付伝動軸５７が伸縮可能に設けられている。すなわち、植付伝動軸５７を外側の植付伝動軸５７ａと内側の植付伝動軸５７ｂとに分割し、内側の植付伝動軸５７ｂの伸縮部（イ）が六角軸に構成され、外側の植付伝動軸５７ａの伸縮部（ロ）に前記六角軸（イ）が嵌合するように構成されている。
【００２８】
また、前記外側ケ−ス６２には該外側ケ−ス６２に固着された外側ケ−ス固定部６４が設けられている。該外側ケ−ス固定部６４は、ロッド部６４ａとそのロッド部の一端に作業位置固定カラ−６４ｂとロッド部の中途部に左右縮小位置固定カラ−６４ｃとが設けられている。一方、外寄りの植付伝動フレ−ム５８の前方に伸縮固定支持プレ−ト６５が前記フレーム５８と一体的に設けられ、該支持プレ−ト６５には前記外側ケ−ス固定部のロッド部６４ａが摺動する切欠き部６５ａが設けられている。また、伸縮固定支持プレ−ト６５には該支持プレ−ト６５に回動支点６６ａをもつ伸縮固定部材６６が設けられている。この伸縮固定部材６６には伸縮固定レバ−６６ｂと伸縮固定プレ−ト６６ｃとを備えている。尚、前記伸縮固定プレ−ト６６ｃには前記伸縮固定支持プレ−ト６５と同様に切欠き部が設けられている。該レバ−６６ｂの操作で伸縮固定プレ−ト６６ｃを前記回動支点６６ａ回りに回動させ、前記外側ケ−ス６２と前記内側ケ−ス６３との左右摺動の固定、解除の切替をするようになっている。すなわち、作業時等、苗植付部３の左右幅拡張時は、前記作業位置固定カラ−６４ｂを前記伸縮固定支持プレ−ト６５と伸縮固定プレ−ト６６ｃとにより挾み込むように内側ケ−ス６３即ち外側２条分の苗植付部を摺動させ伸縮固定レバ−６６ｂで固定する。また、機体の格納時等、苗植付部３の左右幅縮小時は、前記左右縮小位置固定カラ−６４ｃを前記伸縮固定支持プレ−ト６５と伸縮固定プレ−ト６６ｃとにより挾み込むように内側ケ−ス６３即ち外側２条分の苗植付部を摺動させ伸縮固定レバ−６６ｂで固定する。尚、前記伸縮固定支持プレ−ト６５の先端に設けられた板ばねで構成されるレバ−固定具６５ｂにより、前記伸縮固定レバ−６６ｂを固定するようになっている。
【００２９】
尚、左側の副植付伝動ケ−ス間Ｂ（Ｌ）の伸縮については、上述する右側の副植付伝動ケ−ス間Ｂ（Ｒ）と左右対称の構成となるから、説明を省略する。
【００３０】
以上により、前記苗供給装置２０，…の苗箱搬送装置２１，…は前記門型のフレ−ム５９，…により植付伝動部４２に支持固定され、前記苗植付装置２６，…は植付伝動フレーム５８，…を介して植付伝動部４２に取り付けられているので、植付伝動部４２の左右方向の伸縮に伴って苗植付装置２６，…と苗箱搬送装置２１，…も内側に寄せることができ、機体の前後長を大きくすることなく苗植付部３の左右幅を縮小することができると共に簡単な左右幅縮小の構成が得られる。
【００３１】
尚、この実施例は田植機について詳述したが、野菜移植機等の他の苗移植機においても利用できる。
【００３２】
尚、特許請求の範囲の項にある符号は図面との対照を簡便にするためのものであり、本発明は図面の構成に限定するものではない。
【図面の簡単な説明】
【図１】田植機の側面図
【図２】同上平面図
【図３】苗箱の平面図
【図４】（ａ）同上側面図
（ｂ）同上正面図
【図５】苗供給装置の側面図
【図６】苗供給装置の一部の側面断面図
【図７】苗箱搬送装置２条分の支持構成を判り易くした背面図
【図８】苗植付部２条分の一部破断する背面図
【図９】苗植付部２条分の左側面図
【図１０】同上右側面図
【図１１】第二苗取出装置及び苗植付装置を示す側面図
【図１２】苗下降送り装置の搬送工程を判り易く示した図
【図１３】フロ−トの対地感知機構を示す側面図
【図１４】着脱ヒッチ部を示す側面図
【図１５】同上図１４におけるＤ視図
【図１６】植付伝動フレ−ム間の伸縮の構成を示す平面断面図
【図１７】同上図１６のＥ−Ｅ断面図
【図１８】左右幅縮小状態を判り易くした田植機の平面図
【符号の説明】
１…乗用型の田植機（苗移植機）、３…苗植付部、３ａ…苗移植ユニット、７…操縦席、２０…苗供給装置、２１…苗箱搬送装置、２２…第一苗取出装置、２２ｂ…駆動軸、２３…苗下降送り装置、２３ａ…苗ホルダー、２３ｉ…苗ホールド部、２４…第二苗取出装置、２４ａ…苗抜取り具、２５…横送装置、２５ａ…苗送りベルト、２６…苗植付装置、２６ａ…苗植付杆、２６ｃ…植付ガイド、４２…植付伝動部、５８…植付伝動フレーム、Ａ，Ｂ（Ｌ），Ｂ（Ｒ）…苗供給装置間の空間部、Ｎ…苗箱、Ｐ…ポットBACKGROUND OF THE INVENTION
[0001]
  The present invention relates to a configuration of a multi-row planting transplanter.
[Background Art and Problems to be Solved by the Invention]
  Conventionally, as shown in, for example, Japanese Patent Laid-Open No. 6-296407, a seedling supply device that supplies a placed seedling to a seedling planting device is located behind the cockpit, so the seedling supply device is operated by an operator. It was difficult to plant the plant while observing the seedling planting condition.
[Means for Solving the Problems]
[0002]
  The present invention has taken the following technical means to solve the above problems.
[0003]
  That is,In the seedling transplanting machine in which the seedling planting part (3) is mounted on the rear side of the traveling vehicle body (2) provided with the cockpit (7), the seedling transplanting unit (3a) of the seedling planting part (3) A seedling supply device (20) comprising a box transport device (21), a first seedling extraction device (22), a seedling lowering feeding device (23), a second seedling extraction device (24), and a lateral feeding device (25) is provided. WithPlanting transmission part(42)Extending backward fromLeft and rightPlanting transmission frame(58)Back sideOpposite surfaceSeedling planting equipment(26)A seedling box transport device(21)The first seedling removal device from the horizontal row pot of the seedling box conveyed by(22)The seedlings are extruded all at once, and the seedlings that are pushed out are sent down.(23)Seedling holder(23a)Transported down by the seedling holder(23a)Seedling hold part(23i)The seedling holder that receives the seedling held inside(23a)Second seedling picking device that only allows(24)Seedling extractor(24a)By lateral feeding device(25)Seedling feeding belt(25a)The seedling is forcibly removed on the seedling, and the seedling that has been removed is removed from the seedling feeding belt.(25a)To the left and right sidesLeft and rightSeedling planting equipment(26, 26)The seedling planting device(26)Seedlings with seedlings(26a)By receiving from above the planting guide(26c)Transfer until it is upright and plant it in the fieldDouble row plantingSeedling transplant unit(3a)Comprising the seedling transplanting unit(3a)With left and right spacingFourEstablished 8-row seedling planting section( 3)Configure4Seedling transplant unit(3a)The space betweenCenterSpace part(A)WhenLeft and rightSpace part(B (L), B (R))And 3 places,CenterSpace part(A)Cockpit in front of(7)PlaceWidening the field of view behind the operatorThe seedling transplanter was characterized by this.
[Action]
[0004]
  In the seedling transplanting machine of the present invention, the seedling transplanting unit 3a transports the seedling box to the seedling extracting position by the seedling box transport device 21, and the first seedling extracting device 22 transfers the seedling from the horizontal row pot of the seedling box at the seedling extracting position. The seedlings thus pushed out are conveyed downward by the seedling holder 23a of the seedling lowering feeding device 23, and are held in the seedling holding portion 23i of the seedling holder 23a by the seedling extraction tool 24a of the second seedling extracting device 24. The seedlings are received and passed through only the seedling holder 23a, the seedlings are extracted and forcibly removed on the seedling feeding belt 25a of the lateral feeding device 25, and the removed seedlings are conveyed to the left and right sides by the seedling feeding belt 25a. do itLeft and rightThe seedlings are transferred to the seedling planting devices 26, 26, received from above by the seedling planting rod 26a of the seedling planting device 26, and transported until the planting guide 26c is brought into an upright state. To plant. AndFourBetween the seedling transplanting unit 3aCenterThe pilot seat 7 is arranged in front of the space part AByThe field of view behind the operator is widened.
【The invention's effect】
[0005]
  Therefore, it extends backward from the planting transmission part 42.Left and rightRear side of planting transmission frame 58Opposite surfaceThe seedling planting device 26 is provided in the seedling box transporting device 21. The seedlings are transported by the first seedling extracting device 22 from the horizontal row of the seedling box transported by the seedling box transporting device 21. The traverse device 25 is transported by the seedling holder 24a of the second seedling extraction device 24, which is transported downward by the seedling holder 23a, receives the seedling held in the seedling holding portion 23i of the seedling holder 23a, and passes only the seedling holder 23a. The seedling is forcibly removed on the seedling feeding belt 25a, and the removed seedling is conveyed to the left and right sides by the seedling feeding belt 25a.Left and rightThe seedlings are transferred to the seedling planting devices 26, 26, received from above by the seedling planting rod 26a of the seedling planting device 26, and transported until the planting guide 26c is brought into an upright state. PlantDouble row plantingThe seedling transplanting unit 3a is configured, and the seedling transplanting unit 3a is spaced in the left-right direction.FourEstablish and form a seedling planting part 3 for eight-row planting, CenterThe pilot seat 7 is arranged in front of the space part AByThe field of view behind the operator is widened, and the planting operation can be performed while viewing the seedling planting state.
【Example】
[0006]
  An embodiment of the present invention will be described with reference to the drawings.
[0007]
  FIG. 1 shows a riding-type rice transplanter 1 in which an 8-row seedling planting portion 3 is mounted on the rear side of a traveling vehicle body 2. Further, a fertilizer application device 4 for spraying granular fertilizer is disposed at the rear of the traveling vehicle body 2.
[0008]
  The traveling vehicle body 2 is mounted with a pair of left and right front wheels 5 and 5 and rear wheels 6 and 6 and travels by driving these front and rear wheels 5 and 6. A cockpit 7 is provided in the approximate center, and a steering handle 8 is provided on the front side of the cockpit 7. The seedling planting part 3 is attached to the rear part of the traveling vehicle body 2 by a detachable hitch 10 via a link mechanism 9, and a hydraulic lifting cylinder 12 that operates via a hydraulic valve 11 provided in the seedling planting part 3. It can be moved up and down by expansion and contraction. The seedling planting section 3 is configured to operate by driving a planting input shaft 13 to which power is transmitted from the traveling vehicle body side.
[0009]
  The seedling planting unit 3 for eight-row planting includes a seedling box transport device 21,..., A first seedling extraction device 22, a seedling descending feeding device 23, a second seedling extraction device 24, a lateral feeding device 25, Are provided with a seedling supply device 20, and a seedling planting device 26. As shown in FIG. 5 to FIG. 12, the seedling transplanting unit 3 a for each two strips is arranged such that when a plurality of seedling boxes are filled in the seedling box transport device 21, the seedling box transporting device 21 causes the first seedling extraction position. A trajectory in which the seedlings are pushed all at once by the first seedling picking device 22 from the horizontal row pots of the seedling boxes conveyed to the seedling box, and the pushed seedlings are held by the seedling holder 23a of the seedling descending feeding device 23 so as to draw an arc And the second seedling extraction device 24 pulls it down on the lateral feeding device, and the laterally feeding device 25 separates the dropped seedling into left and right half seedling planting devices 26 and 26, which are laterally fed. Then, seedlings are planted in the field by seedling planting devices 26, 26 one by one. Further, floats 31a, 31a, 31b, and 31b are provided at the lower part of the seedling planting part 3, and the structure slides while leveling the farm scene. Each of the floats 31a, 31a, 31b, 31b is provided so as to rotate about the pivot shaft 32 in the left-right direction. The height of the pivot shaft 32 in the left-right direction with respect to the seedling planting device 26 can be adjusted by the rotation of the planting depth adjusting pipe 33, and the rotation angle of the planting depth adjusting pipe 33 can be adjusted. The planting depth lever 34 is used for adjustment.
[0010]
  Further, the two floats 31a, 31a closer to the inner center of the four floats 31a, 31a, 31b, 31b are connected to each other by a connecting member 35 at the front end of the float. -The configuration is such that the rotation angles in the front-rear direction of the G 31a, 31a are the same. A field scene sensing mechanism 36 as shown in FIG. 13 is formed in the middle part between the two floats of the connecting member 35, and the hydraulic valve 11 for raising and lowering the seedling planting unit 3 is provided in the field scene sensing mechanism 36. Attached and configured to switch the spool 11a of the hydraulic valve 11 in accordance with the operation of the farm scene sensing mechanism 36. The field scene detection mechanism 36 is formed by a U-shaped plate 36a, links 36b and 36c, which are fixed to the connecting member 35 and opened upward, and pivot shafts 36d and 36e which pivotally support the links 36b and 36c. , 36f. The hydraulic valve 11 has a main body pivotally supported on the pivot shaft 36d, and a spool end provided on another pivot shaft 36h provided on a plate 36g pivotally attached to the U-shaped plate 36a. It is pivotally attached to the left side of these link mechanisms. A torque spring 36i is provided between the U-shaped plate 36a and the pivot shaft 36h. Therefore, when the front part of the float moves up, the plate 36g moves up while being urged by the torque spring 36i to push up the spool 11a of the hydraulic valve 11, and the hydraulic valve 11 moves inside the hydraulic lift cylinder. The hydraulic pressure is supplied to the seedling and the seedling planting part 3 rises. On the contrary, when the front part of the float is moved downward, the plate 36g is moved downward to push down the spool 11a of the hydraulic valve 11, and the hydraulic valve 11 causes the hydraulic pressure of the hydraulic lifting cylinder 12 to be increased by the hydraulic tank 37 ( The lubricating oil in the mission case is returned to that used for oil pressure), and the seedling planting part 3 is lowered. That is, the hydraulic lifting cylinder 12 is operated in accordance with the vertical movement of the front part of the float so that the seedling planting part 3 can be maintained at a predetermined height with respect to the field scene.
[0011]
  Further, the planting is performed by the hydraulic valve adjusting link 40 that rotates around the rotation fulcrum 40a provided in the sub planting transmission case 39 via the rod 38 as the planting depth adjusting pipe 33 rotates. The height of the hydraulic valve 11 with respect to the transmission portion is adjusted. That is, the height of the hydraulic valve 11 with respect to the planting transmission portion is set corresponding to the planting depth. The rod 38 can be adjusted in length by nuts 41, 41, etc., and does not overlap with the seedling supply device 20,... In plan view or rear view, so that the seedling supply device 20,. An operator puts himself / herself into the space A in between, the length of the rod 38 can be adjusted, and maintenance is easy.
[0012]
  The detachable hitch 10 includes a front hitch 10a that constitutes the link mechanism 9 and a rear hitch 10b that can be attached to and detached from the front hitch 10a. As shown in FIGS. 14 and 15, a rolling bearing portion 41 that supports the seedling planting portion 3 is provided below the rear hitch 10 b. A rolling shaft 43 fixed to the planting transmission section 42 of the seedling planting section 3 is fitted to the bearing section 41 to support the seedling planting section 3. Further, the seedling planting portion 3 is configured to be rotatable around the rolling shaft 43 with respect to the detachable hitch 10. A rolling arm 44 pivotally supported by the hitch 10b is provided behind the rear hitch 10b. That is, a plate 45 having a rotating shaft 45a of a rolling arm 44 fixed to the rear side of the hitch 10b is attached by bolts 45b, 45c, nuts 45d, 45e, 45f, etc., and is rotated by the rotating shaft 45a. -Pivoting ring arm 44; Further, the rotation shaft 45a is provided with a pin hole 45g, and the pin 46 is inserted and fixed in the pin hole 45g to restrict the rolling arm 44 from moving forward along the rotation shaft 45a. is doing. Rolling springs 48, 48 are hung on the upper part of the rolling arm 44 from frame parts 47, 47 fixed to the left and right of the planting transmission part 42 of the seedling planting part 3. The lower part of the rolling arm 44 is a fan-shaped gear 44a. The output of the output gear 49a of the rolling motor 49 is decelerated by the counter gears 50 and 51 to the fan-shaped gear 44a. It has come to be. Accordingly, when the rolling arm 44 rotates around the rotation shaft 45a by the drive of the output gear 49a of the rolling motor 49 and tilts in the left-right direction with respect to the detachable hitch 10, it is hung on the upper portion of the arm. One of the left and right rolling springs 48, 48 is pulled (the other is returned in the spring direction) so that the seedling planting portion 3 is inclined to the left and right with respect to the traveling vehicle body 2. When there is a difference in the detection values of the left and right float up motion detection sensors 52L and 52R that detect the upward movement of the front portions of the left and right outermost floats 31b and 31b, the rolling motor 49 The sensors 52L and 52R are operated so as to be equal to each other, that is, so as to make the seedling planting part 3 horizontal with the field scene. Further, the rolling arm 44 is slid in the direction of the rotation shaft 45a, and the meshing of the counter gear 51 and the fan-shaped gear 44a at the lower part of the arm is released. The seedling planting part 3 can be fixed in parallel. That is, the pin 46 inserted in the pin hole 45g of the rotation shaft 45a of the arm 44 is removed, the arm 44 is moved forward along the rotation shaft 45a, and the pin 46 is again moved to the pin hole 45g. By switching the arm position by inserting and fixing, the transmission from the rolling motor 49 to the arm 44 is cut off and the arm 44 is fixed to the arm 44 below the arm. The movement restricting pin 44b is fitted into a pin fitting hole 45h provided in the plate 45 so that the rotation of the rolling arm 44 is fixed. In this rolling switching operation, since the arm portion does not overlap with the seedling supply device 20,... In plan view or rear view, the operator moves from the rear of the fuselage to the space A between the seedling supply devices 20,. Can be switched on and off.
[0013]
  By the way, the seedling box N used in this riding type rice transplanter 1 is a plastic flexible seedling box, and has a shape as shown in FIGS. That is, the small pots P,... Are arranged at predetermined intervals on the left and right sides, the openings Pa,... Are connected to each other, and the bottoms Pb,. Moreover, square holes Nb,... For feeding the seedling box are provided in the left and right edge portions Na, Na along the longitudinal direction of the seedling box N in accordance with the distance in the longitudinal direction of the pots P,. In the bottom part Pb,... Of each pot P,..., A cut line Pc is provided through which the seedling extrusion pin 22a can enter from the bottom part side. Nc is a wide space portion provided in the left and right (short direction) center in the longitudinal direction. The seedlings are sown and seeded by filling the pots P,. In this way, the seedling box N grown for each plant in each pot P,... Is loaded into the seedling box supply units 21a, 21a of the seedling planting unit 3 together with the seedling box, and the seedlings of the first seedling extraction device 22 from the bottom side. The seedling is taken out by being pushed out by the push pin 22a.
[0014]
  The seedling box transport device 21 is provided for every two strips, and as shown in FIG. 5, the upper and lower two-stage seedling box supply parts 21a and 21a (seedling supply part) inclined downward and the two-stage seedlings. The seedling box transport section 21b (main supply section) that transports the seedling box transport path from the box supply sections 21a and 21a and then transports the seedling box to the upper front side, followed by the seedling box supply section 21a (seedling) It is the structure which consists of the empty box conveyance part 21c which conveys an empty box to the downward direction of a supply part. In addition, an empty box housing frame 21d is provided at the outlet of the empty box transport section 21c so that a plurality of empty boxes discharged therefrom can be stored in a stacked state. The two upper and lower seedling box supply parts 21a and 21a are fixed by loop-shaped pipes 60 and 60 fixed to the seedling box supply part support frame 54. The upper and lower two-stage seedling box supply units 21a and 21a are provided with seedling box supply operation motors 53 and 53, respectively, and the motor 53 includes transport rollers 53a and 53a on a drive shaft. . Further, a holding roller 53b urged in the direction of the conveying roller 53a by a spring force is provided above the conveying roller 53a, and the conveying rollers 53a and 53a and the pressing roller 53b are provided. , 53b, the seedling box is transported across the seedling box edge Na / Na. The controller 55 attached to the seedling box supply unit support frame 54 drives the transport roller 53a as the seedling box of the seedling box transport unit 21b (main supply unit) decreases, and the seedling box It is the structure which controls supply of the seedling box of the supply parts 21a and 21a.
[0015]
  In addition, as shown in FIG. 6, the seedling box conveyance path is a side view of the junction part of the seedling box conveyance path from the upper and lower two-stage seedling box supply sections 21a and 21a to the seedling box conveyance section (main supply section) 21b. In order to reduce this transport resistance, the width W in the direction intersecting the transport direction of the seedling box transport path is wide. However, when the width W is wide, the seedling box flutters in a direction intersecting the transport direction, and the pot seedling easily falls off the seedling box. Therefore, a seedling holding plate 56 that can rotate freely around the rotation shaft 56a in the left-right direction is provided, and the plate 56 can transfer seedlings in the seedling box N that passes through the joining portion into the pot of the seedling box N. The plate 56 is configured to be pressed by the dead weight of the plate 56 from the opening Pa side of the P. The seedling holding plate 56 suppresses fluttering of the seedling box in the direction intersecting the conveying direction at the merging portion, and prevents the pot seedling from falling off the seedling box.
[0016]
  As shown in FIG. 2, the transmission structure of the seedling planting unit 3 is such that the planting transmission shaft 57 is driven from the planting input shaft 13 via a bevel gear or the like, and the sub-planting transmission of each strip is transmitted from the transmission shaft 57. In this case, power is transmitted to the cases 39,..., Planting transmission frames 58,. Further, as shown in FIG. 7, the seedling box transport section (main supply section) 21b,... Has left and right transmission cases 59a, which are supported on the upper side by a planting transmission section 42 incorporating the transmission shaft 57. 59b, ... and the frame 59c connecting the transmission cases 59a, 59b are supported and fixed by a gate-type frame 59, ... and fixed to the upper side of the frame 59c. The seedling box supply unit support frame 54 supports the seedling box supply units 21a and 21a, the empty box transport unit 21c, and the empty box housing frame 21d. The seedling box passes through a portion surrounded by the planting transmission part 42 and the gate-shaped frame 59. Each of the seedling conveying devices 21 for each of the two strips is configured by providing space portions A, B (L), B (R) therebetween. In this rice transplanter, the space A between the seedling supply devices 20, ... is located behind the cockpit 7, so that the field of view behind the operator is widened and the planting state is observed while watching the seedling planting state. Attached work can be done.
[0017]
  As shown in FIG. 8 to FIG. 10, the seedling boxes are transported intermittently by one row across the pot intermittently while locking the seedling box at the first seedling extraction position, to the seedling box transport section 21 b of the seedling box transport device 21. A seedling box vertical feeding device 61 is provided. The seedling box vertical feeding device 61 is connected to feeding claws 61a and 61a that reciprocate along the seedling box conveyance path so as to act on the square hole Nb for feeding the seedling box at the edge of the seedling box. There are provided locking claws 61b, 61b to be removed. The operation of the seedling box vertical feed device 61 is configured to operate in conjunction with the seedling box vertical feed drive shaft 61c protruding from each left side of the sub-planting transmission case 39 for every two strips.
[0018]
  Next, a mechanism for each of the two strips from when the seedling is taken out from the seedling box to when the seedling is planted in the field will be described with reference to FIGS.
[0019]
  The first seedling take-out device 22 is arranged next to the seedling box with a seedling push-out pin 22a,... That slides the seedling in the pot at the first seedling taking-out position from the seedling box transported by the seedling box transporting device 21. It is a configuration that pushes out one row at a time. The first seedling picking device 22 is linked to a seedling picking and transporting drive shaft 22b protruding from each left side portion of the sub planting transmission case 39. That is, the drive arm 22c that rotates integrally with the drive shaft 22b is connected to the operating arm 22g that is attached to the push-out operating shaft 22f of the left transmission case 59a via the telescopic rod 22d. The pushing operation shaft 22f swings the pushing operation portion in the left transmission case, so that the seedling pushing shaft 22i is actuated. The pushing operation shaft 22f passes through the frame 59c and transmits power to the right transmission case 59b. Similarly, the pushing operation portion in the right transmission case is operated and the left seedling pushing shaft 22i is operated. It is. Therefore, the seedling pushing pins 22a,... Attached to the left and right seedling pushing shafts 22i, 22i are slid by the rotational drive of the drive shaft 22b. Further, the seedling extrusion pins 22a,... Are provided at the same number and pitch with respect to the lateral pot of the seedling box, and the bottom of the extrusion hole 22k,... Of the extrusion pin guide 22j and the horizontal row of the seedling box. It operates through the cut line Pc to push out seedlings for one horizontal row. In addition, after extruding the seedling, the extruding pins 22a,... Are pulled back before the seedling box vertical feeding device 61 is operated.
[0020]
  As shown in FIG. 12, the seedling lowering and feeding device 23 receives the seedlings for one horizontal row pushed out by the first seedling extracting device 22 by the seedling holder 23 a at the seedling receiving position P <b> 3, and the second seedling extracting device 24. It is an apparatus which conveys to the seedling extraction positions P1 to P2. In the seedling lowering and feeding device 23, a drive arm 23c that rotates integrally with the drive shaft 22b for taking out and transporting the seedlings that protrudes to the right side of the sub-planting transmission case 39 is transmitted to the right via the telescopic rod 23e. Power is transmitted to the seedling holder operating portion built in the case 59b, and swing arms 23d, 23d, 23d provided on the left and right outer portions of the transmission cases 59a, 59b from the seedling holder operating portion, It is linked to swing shafts 23h, 23h that rotate integrally with 23d. The ends of the swing arms 23d,... Are pivotally attached to support plates 23f, 23f that are fixed to the left and right ends of the seedling holder 23a, and the swing arms 23d are operated with the swing shafts 23h, 23h as pivots. , 23d and the support plate 23f form a parallel link. When the drive arm 23c is driven to rotate, the swing arm 23d,... Moves up. When the seedling holder 23a reaches the seedling push-out position P3, the upper swing arm 23d hits the stopper body 23g and stops. The drive arm 23c still rotates and tries to move the swing arm 23d upward, but the telescopic rod 23e extends (the spring in the spring case of the telescopic rod 23e contracts) and the swing arm 23c expands. 23d remains stopped by the stopper body 23g. Therefore, while the swing arm 23d is stopped by hitting the stopper body 23g, the seedling holder 23a is positioned at the seedling receiving position P3 and receives the seedling pushed out by the first seedling extracting device 22.
[0021]
  This seedling descending feeding device 23 is stopped when the seedling holder 23a is positioned at the seedling receiving position P3 before the projecting operation (seedling pushing operation) of the seedling pushing pins 22a,. When the seedling push-out pins 22a,. Then, the seedlings transported by the seedling lowering feeding device 23 when the lateral feeding device 25 has just finished transporting the seedlings received last time to the left and right seedling picking positions are delivered to the lateral feeding device by the second seedling extraction device 24. Operates as follows. Thereafter, the seedling holder 23a moves up again and returns to the seedling receiving position P3. The seedling lowering and feeding device 23 receives the seedling holders 23a, which receive the seedlings pushed out by the first seedling extracting device 22, respectively. It is formed according to the position in the left-right direction of the pots P,.
[0022]
  As shown in FIG. 12, the second seedling extraction device 24 is held by each seedling hold portion 23i of the seedling holder 23a when the seedling lowering feeding device 23 has moved to the seedling extraction positions P1 to P2. This is a device for extracting the seedlings with the seedling extractor 24a and dropping them on the seedling feeding belts 25a and 25a of the transverse feeding device 25. The seedling removal tool 24a is formed in a comb shape, and receives the seedlings held in the seedling hold portions 23i,... It is provided so that seedlings can be extracted by passing through. The seedling extractor 24a is provided so as to move up and down by a cam disk 24b attached so as to rotate integrally with the drive shaft 22b of the first seedling extraction device 22 protruding from the left side of the planting transmission section 42. . That is, a pin 24e is fixed to a rotary arm 24d that rotates about a rotary shaft 24c, and a spring 24f that urges the pin 24e to come into contact with the cam surface of the cam disk 24b is connected to the rotary arm 24d. -Attach it to the 24d. The base of the seedling extractor 24a is integrally attached to the rotating arm 24d by bolts 24g and 24g. As a result, as soon as the seedling extraction tool 24a extracts the seedling from the seedling holder 23a, the seedling extraction tool 24a is moved down by the cam mechanism and forcibly dropped onto the seedling feeding belts 25a and 25a of the lateral feeding device 25. Further, the attachment holes 24h, 24h to the turning arm 24d of the seedling extractor 24a are formed as elongated holes in the vertical direction, and the seedling extractor 24a is provided so that the mounting position can be adjusted in the vertical direction. Thereby, as shown in FIG. 12, according to the hardness of the root pot r of the pot seedling, when the root pot r is hard, the portion above the center of the root pot bottom surface of the seedling with the leaf facing backward is extracted from the seedling. The tool 24a abuts and acts to increase the resistance of the seedling to be extracted from the seedling holder 23a to prevent the seedling from jumping out due to the extraction of the seedling. You can drop seedlings.
[0023]
  The horizontal feeding device 25 receives the seedlings for one horizontal row removed by the second seedling picking device 24 on the seedling feeding belts 25a and 25a, and the seedling picking positions S of the right and left seedling planting devices 26 and 26 are divided into left and right halves. A device that transports to S. The lateral feed device 25 is connected to drive shafts 25b and 25b that project rearward from the planting transmission portion 42 and rotate in opposite directions so that the drive rollers 25c and 25c are integrally rotated. The seedling feed belts 25a and 25a are wound around 25c and 25c and driven rollers 25d and 25d rotatably supported on the left and right inner sides thereof, and the upper surfaces of the seedling feed belts 25a and 25a are respectively left and right outer sides. It is designed to move to. Further, a plurality of protrusions 25e,... Are provided on the outer peripheral surface of the seedling feeding belt 25a, and the seedlings are pulled out and conveyed by the second seedling extracting device 24 to a position sandwiched between the left and right of the protrusions 25e,. The rotation operation of the seedling feeding belts 25a and 25a conveys the seedlings to the seedling picking positions S and S in accordance with the timing at which the seedling planting devices 26 and 26 pick seedlings from the seedling picking positions S and S one by one. In addition, between the right and left seedling feeding belts, a cross-sectionally mountain-shaped member 25f is provided to cover the gap.
[0024]
  The seedling planting device 26 is a device that takes the seedlings that have been transported to the seedling picking position S by the lateral feeding device 25 one by one and plants them in the field. The seedling planting device 26 is attached to a rear side portion of a planting transmission frame 58 extending rearward from the planting transmission unit 42, and is driven by transmission from the planting transmission frame 58. It is the structure provided with the inserts 26a and 26a. The tips of the two seedling planting rods 26a and 26a move along a closed loop trajectory T, and plant seedlings alternately in the field. The seedlings on the seedling feeding belt of the lateral feeding device 25 are dropped into the seedling receiving portion 26b provided at the seedling collecting position S at the end of the belt. The seedling receiving part 26b is formed in the upper part of the plate-shaped planting guide 26c arranged on the left and right. The seedling received by the seedling receiving portion 26b is received from above at the tip of the seedling planting rod 26a and is forced to move the planting guide 26c by the seedling planting rod 26a. Then, the seedlings are transferred until the seedlings stand upright in the field scene by the seedling planting rod 26a, and the seedlings are planted in the field.
[0025]
  Next, the expansion-contraction structure to the left-right direction of the planting transmission part 42 is demonstrated.
[0026]
  The planting transmission portion 42 is configured such that portions B (L) and B (R) excluding the left and right center portions between the planting transmission frames where the sub planting transmission cases 39,. ing. Based on FIG. 16, FIG. 17, the specific structure is demonstrated about expansion / contraction of B (R) between the sub planting transmission cases on the right side.
[0027]
  The expansion / contraction part between the sub-planting transmission cases is formed on the side of the planting transmission frame near the center and on the side of the planting transmission frame on the outer side 62 fixed to the frame 58 and on the side of the planting transmission frame on the outside. An inner case 63 fixed to the frame 58 is provided. The outer case 62 and the inner case 63 are in sliding contact with each other so that the planting transmission frame expands and contracts. Similarly, the planting transmission shaft 57 is provided in the telescopic portion so as to be telescopic. That is, the planting transmission shaft 57 is divided into an outer planting transmission shaft 57a and an inner planting transmission shaft 57b, and the expansion / contraction portion (A) of the inner planting transmission shaft 57b is configured as a hexagonal shaft. The hexagonal shaft (A) is configured to be fitted to the expansion / contraction portion (B) of the planting transmission shaft 57a.
[0028]
  The outer case 62 is provided with an outer case fixing portion 64 fixed to the outer case 62. The outer case fixing portion 64 is provided with a rod portion 64a, a working position fixing collar 64b at one end of the rod portion, and a left and right reduced position fixing collar 64c at a middle portion of the rod portion. On the other hand, an expansion / contraction fixing support plate 65 is provided integrally with the frame 58 in front of the outer planting transmission frame 58, and the support plate 65 has a rod for the outer case fixing portion. A notch portion 65a is provided on which the portion 64a slides. The expansion / contraction fixing support plate 65 is provided with an expansion / contraction fixing member 66 having a rotation fulcrum 66a. The expansion / contraction fixing member 66 is provided with an expansion / contraction fixing lever 66b and an expansion / contraction fixing plate 66c. The expansion / contraction fixing plate 66c is provided with a notch as in the expansion / contraction fixing support plate 65. By operating the lever 66b, the expansion / contraction fixing plate 66c is rotated around the rotation fulcrum 66a, and the lateral sliding between the outer case 62 and the inner case 63 is fixed and released. It is supposed to be. That is, when the right and left width of the seedling planting part 3 is expanded, for example, when working, the inner position is fixed so that the working position fixing collar 64b is swallowed by the expansion / contraction fixing support plate 65 and the expansion / contraction fixing plate 66c. -Slip 63, that is, the seedling planting portion for the two outer strips, is slid and fixed with the expansion and contraction fixing lever 66b. Further, when the right and left width of the seedling planting part 3 is reduced, such as when the body is stored, the left and right reduced position fixing collar 64c is swallowed by the expansion / contraction fixing support plate 65 and the expansion / contraction fixing plate 66c. The inner case 63, that is, the seedling planting portion for the two outer strips, is slid and fixed with the expansion / contraction fixing lever 66b. In addition, the expansion / contraction fixing lever 66b is fixed by a lever fixing tool 65b composed of a leaf spring provided at the tip of the expansion / contraction fixing support plate 65.
[0029]
  The expansion / contraction of the left sub planting transmission case B (L) is symmetrical with the right sub planting transmission case B (R) described above, and the description thereof is omitted. .
[0030]
  As described above, the seedling box transporting devices 21,... Of the seedling supply devices 20,... Are supported and fixed to the planting transmission unit 42 by the portal frame 59,. Since it is attached to the planting transmission part 42 via the attached transmission frame 58,..., The seedling planting device 26,. The lateral width of the seedling planting part 3 can be reduced without increasing the longitudinal length of the machine body, and a simple configuration for reducing the lateral width can be obtained.
[0031]
  In addition, although this Example explained in full detail about the rice transplanter, it can utilize also in other seedling transplanters, such as a vegetable transplanter.
[0032]
  In addition, the code | symbol in the term of a claim is for making contrast with drawing easy, and this invention is not limited to the structure of drawing.
[Brief description of the drawings]
[Figure 1] Side view of rice transplanter
[Fig. 2] Same as above
[Fig. 3] Plan view of seedling box
Fig. 4 (a) Side view
            (B) Same as above
FIG. 5 is a side view of the seedling supply device.
FIG. 6 is a side sectional view of a part of the seedling supply device.
FIG. 7 is a rear view in which the support structure for the two seedling box transfer devices is easily understood.
[Fig. 8] Rear view with partial breakage of two seedling planting sections
[Figure 9] Left side view of 2 sections of seedling planting section
[Figure 10] Same as above, right side view
FIG. 11 is a side view showing a second seedling extraction device and a seedling planting device.
FIG. 12 is a diagram showing the conveying process of the seedling descending feeding device in an easily understandable manner.
FIG. 13 is a side view showing the ground sensing mechanism of the float.
FIG. 14 is a side view showing a detachable hitch portion.
FIG. 15 is a view of D in FIG.
FIG. 16 is a plan sectional view showing a configuration of expansion and contraction between planting transmission frames.
17 is a cross-sectional view taken along the line EE of FIG.
FIG. 18 is a plan view of a rice transplanter in which the left and right width reduced state is easily understood.
[Explanation of symbols]
  DESCRIPTION OF SYMBOLS 1 ... Passenger type rice transplanter (seedling transplanter), 3 ... Seedling planting part, 3a ... Seedling transplanting unit, 7 ... Steering seat, 20 ... Seedling supply device, 21 ... Seedling box transport device, 22 ... First seedling extraction Device 22b ... Drive shaft 23 ... Seedling descending feeding device 23a ... Seedling holder 23i ... Seedling holding part 24 ... Second seedling extracting device 24a ... Seedling extractor 25 ... Transverse feeding device 25a ... Seedling feeding belt 26 ... Seedling planting device, 26a ... Seedling planting pad, 26c ... Planting guide, 42 ... Planting transmission part, 58 ... Planting transmission frame, A, B (L), B (R) ... Seedling feeding device Space part between N, seedling box, P ... pot

Claims

In the seedling transplanting machine in which the seedling planting part (3) is mounted on the rear side of the traveling vehicle body (2) provided with the cockpit (7),
As a seedling transplanting unit (3a) of the seedling planting part (3), a seedling box conveying device (21), a first seedling extracting device (22), a seedling descending feeding device (23), and a second seedling extracting device (24) A seedling feeding device (20) comprising a lateral feeding device (25) is provided, and a seedling planting device is provided on the rear facing surface of the two left and right planting transmission frames (58) extending rearward from the planting transmission unit (42) . (26)
The seedlings are simultaneously pushed out by the first seedling picking device (22) from the horizontal row of pots of the seedling box transported by the seedling box transporting device (21) , and the pushed seedlings are seeded in the seedling holder ( 23) lowered conveyed by 23a), the seedling holder (seedling holding portion 23a) (23i) seedlings extraction tool seedlings holder receiving the seedling to be held (the second seedling taking out apparatus passes 23a) alone (24) into the horizontal by (24a) feeder (25) seedling feed belt (25a) to force the seedlings on bleeding off of, remove the fallen seedlings said seedling feed belt (25a) left and right seedling is transported to the left and right sides by transported planting device (26, 26), and a state in which the transported seedlings were upright receives from above the planting guide (26c) by seedling planting rod (26a) of said seedling planting apparatus (26) Transfer until the plant is planted in the field Kicking constitute seedlings transplant unit 2 Joue (3a),
該苗transplant unit (3a) and at intervals in the left-right direction 4 provided Article 8 planted seedlings planting unit constitute a (3),
Central space portion space between four seedlings transplant unit (3a) (A) and the left and right space portions provided three positions out with (B (L), B ( R)), a center of the space (A by arranging the cockpit (7) in front of), seedling transplantation machine, characterized in that it has a wide rear field of view of the operator.